Advanced Anconeus Quiz

Q1. Which feature of the anconeus explains its ability to assist triceps brachii during terminal elbow extension?

• It crosses only the wrist joint
• It inserts on the radial tuberosity
• Its line of pull passes posterior to the elbow axis
• Its tendon passes anterior to the elbow axis

Q2. Which relationship explains why anconeus contraction can reduce posterior capsular impingement during elbow extension?

• It attaches to the anterior capsule of the shoulder
• Its fibers are associated with the posterior elbow capsule
• It inserts into the flexor retinaculum
• It surrounds the radial artery

Q3. Which nerve relationship is most relevant when considering the motor supply of the anconeus during posterior elbow surgery?

• The musculocutaneous nerve supplies the entire muscle
• The ulnar nerve terminates within the muscle
• The median nerve passes through the muscle belly
• A radial nerve branch supplies the muscle

Q4. Which arterial network helps provide vascular supply to the anconeus around the posterior elbow?

• Deep palmar arch only
• Palmar carpal arterial network
• Elbow periarticular arterial anastomosis
• Scapular anastomosis only

Q5. The middle collateral artery supplying the posterior elbow usually arises from which artery?

• Anterior interosseous artery
• Ulnar artery
• Posterior circumflex humeral artery
• Profunda brachii artery

Q6. Which functional consequence would be most expected from isolated weakness of the anconeus?

• Complete loss of elbow extension
• Mild impairment of elbow extension assistance and stabilization
• Complete loss of elbow flexion
• Loss of thumb opposition

Q7. Why can elbow extension remain strong despite isolated paralysis of the anconeus?

• Brachialis extends the elbow
• Biceps brachii becomes the principal elbow extensor
• Pronator teres replaces all anconeus function
• Triceps brachii remains the principal elbow extensor

Q8. During pronation, what proposed mechanical role does the anconeus perform at the proximal ulna?

• Slightly abducts the ulna
• Pulls the ulna into the carpal tunnel
• Strongly rotates the ulna around the radius
• Flexes the ulna at the wrist

Q9. Why is the anconeus clinically relevant in posterolateral approaches to the elbow?

• It contains the median nerve throughout its length
• It forms the roof of the carpal tunnel
• It forms the medial boundary of the axilla
• It occupies the posterolateral elbow and can serve as a surgical landmark

Q10. Which description best summarizes the anconeus muscle?

• An ulnar nerve supplied forearm muscle that flexes the wrist
• A radial nerve supplied posterolateral elbow muscle that assists extension and stabilization
• A musculocutaneous nerve supplied shoulder muscle that abducts the arm
• A median nerve supplied anterior arm muscle that flexes the elbow